The Long Winter compounded the problems: Rohan was under snow for five months with both the Rohirrim and their enemies suffering grievously from famine. Meanwhile, King Helm took refuge in the Hornburg and the ravine behind (becoming known as Helm's Deep): at Yule a great counsel was held, and, against the King's advice, Háma, Helm's younger son, went out in a sortie and was lost in the snow. King Helm himself would secretly go out to enemy camps, clad in white, and slay many men with his bare hands - before he left he would always blow his great horn, striking fear into the hearts of his enemies. One day, the men heard Helm's great horn blowing in the Deeping-coomb, but when they came to him, they saw that he had died, standing upright.[1]

Come March T.A.2759, the Long Winter ended and Fréaláf Hildeson, Helm's sister-son and new King of Rohan, came from Dunharrow and took back Edoras, catching the Dunlendings unaware and killing Wulf; the Dunlendings and Easterlings were driven out of Rohan (including Isengard), or else they had perished. The melted snow caused great floods with the Entwash becoming a vast fen; and in the spring, once Beregond, son of StewardBeren, had defeated the invaders from the south, Gondor sent aid to Rohan.

Gondor

Although the Long Winter did not affect Gondor directly, it did have an indirect affect: in T.A.2758, three fleets[1] of Corsairs and Haradrim began to assail the coasts of Gondor as far north as the River Isen;[2] due to the dual perils of the Long Winter and the war with the Dunlendings, the Rohirrim were unable to send help.[3]

"'And then there was the Shire-folk. I began to have a warm place in my heart for them in the Long Winter, which none of you can remember. They were very hard put to it then: one of the worst pinches they have been in, dying of cold, and starving in the dreadful dearth that followed. But that was the time to see their courage, and their pity one for another. It was by their pity as much as their tough uncomplaining courage that they survived. I wanted them to survive. [...] And anyway you must begin at some point, with some on person. I dare say he was "chosen" and I was only chosen to choose him; but I picked out Bilbo.'"